In guinea pigs, black hair (B) is dominant to brown hair (b) and short hair (H) is dominant to long hair (h). A black, long-haired male guinea pig (Bbhh) is crossed with a brown, short-haired female guinea pig (bbHh). 1. What is the genotype of the male parent? 2. What is the phenotype of the female parent? 3. What is the genotype of their baby guinea pig (in the empty box)? (male) Bbhh Bh Bh bh bh bH BbHh Bbhh Bbhh Bbhh (Temale) bh Bbhh Bbhh Bbhh Bbhh bbHh bH BbHh BbHh bbHh bbHh bh Bbhh bbhh bbhh B= Black hair b= brown hair H= long hair h= short hair a BhbH - calico long fur - gray wavy fur bhbh - brown short hair - BbHh BbHh - black long hair - black short hair O d Bbhh - brown, short-hair - Bbhh

2. Brown eyes are dominant over blue eyes in humans. Having a peaked hairline is dominant over having a smooth hairline in humans. Two such humans decide to have offspring – who will also be human, because you know – genes. One of the parents has blue eyes and is heterozygous for a peaked hairline. The other parent is brown-eyed with a peaked hairline but is heterozygous for both traits. a) Complete a Punnett square showing all possible genotypes of their offspring. b) What is the probability of this couple producing a child with blue eyes? c) What is the probability of producing a child who has both brown eyes and a smooth hairline?

Fruit flies with the genotypes Xg+h+Xgh and XghY are crossed. Note that two X-linked loci are being evaluated, and the presence of a + indicates a dominant allele. The homogametic offspring will.... 1. express either the dominant or the recessive phenotypes for both g and h. 2. all express both dominant phenotypes. 3. express neither phenotype. 4. all express both recessive phenotypes.

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8. In guinea pigs, the allele for black fur (B) is dominant over the allele for white fur (b). Similarly, the allele for straight hair (H) is dominant over the allele for having rough hair (h). Pure breeding rough haired guinea pigs with black fur were crossed with pure breeding straight haired guinea pigs with white fur. a. State the genotype and the phenotype of the F1 individuals produced as a result of this cross.b. Two F1 offspring were mated together. Calculate the expected ratio of phenotypes in the F2 generation.c. Show the completed Punnett square below.

What does a Punnett square tell you?   a.The inheritance pattern for a pair of alleles   b.The phenotype probabilities of offspring for a given cross   c.The number of offspring who will have a particular genotype for a given cross   d.The genotype probabilities of offspring for a given cross 2.What would be the most likely karyotype for somebody described as “hemizygous positive for a Y-linked trait”?   a.Y+ Y+   b.X Y+   c.X+ Y+   d.X+ Y- 3.X-linked ichthyosis is an X-linked recessive trait that manifests in part as dry, scaly skin (“ichthy-” = fish or fish like). Suppose a couple are considering having a child together. Parent A is heterozygous for the ichthyosis allele while Parent B is hemizygous negative for the ichthyosis allele. What is the probability their child would be unafflicted with ichthyosis but be a carrier of the ichthyosis-causing allele?   a.0%   b.25%   c.50%   d.75%   e.100% 4.If somebody has the phenotype of…

1. In mice, black fur (B) is dominant over brown fur (b). Breeding a brown mouse and a homozygous black mouse produces all black offspring. a. What is the genotype of the gametes produced by the brown-furred parent? b. What genotype is the brown-furred parent? . c. What genotype is the black-furred parent? . d. What genotype is the black-furred offspring?. e. If two F, mice are bred with one another, what phenotype will the F, offspring be, and in what proportion? phenotype. proportion.

It would be nice if you can give me some explanation please Number 6

17. Three recessive traits in aardwolf (a real animal) are stripe-less (s), dwarf (d), and fluffy mane (f). A stripe-less and fluffy female aardwolf mates with a dwarf male aardwolf to produce an F1 that is all WT (has stripes, normal size, and non-fluffy mane). When an F1 is test crossed to a fully recessive aardwolf, the following F2 are produced: Stripe-less, fluffy, normal sized 89 Striped, non-fluffy, dwarf 92 Stripe-less, non-fluffy, dwarf 1 Striped, fluffy, normal sized 2 11 13 19 20